Question 1

How do I choose the right root key for my song?

Accepted Answer

Listen to the lowest/strongest note in the bass, or determine it using the Song Key Finder tool. Start in C major if unsure—you can transpose to any key instantly once the progression is set.

Question 2

What are diatonic chords?

Accepted Answer

Chords built from notes within a single scale (major or minor). In C major, the diatonic chords are C, Dm, Em, F, G, Am, Bdim—no accidentals. They blend together harmonically because they share the same parent scale.

Question 3

What's the difference between major and minor mode?

Accepted Answer

Major sounds bright and resolved. Minor sounds darker and introspective. Same root key produces different chord qualities: C major's iii chord is Em; C minor's iii chord is Eb major.

Question 4

How do I read Roman numerals?

Accepted Answer

Uppercase = major (I, IV, V). Lowercase = minor (ii, iii, vi). Diminished = lowercase with ° (vii°). In C major: I=C, ii=Dm, iii=Em, IV=F, V=G, vi=Am, vii°=Bdim.

Question 5

What are the most popular chord progressions?

Accepted Answer

I–V–vi–IV (pop ballads), ii–V–I (jazz), I–IV–V (blues), vi–IV–I–V (modern ballads), I–vi–IV–V (oldies), iii–vi–ii–V (smooth jazz).

Question 6

Can I use diatonic progressions for any music genre?

Accepted Answer

Yes. Pop, rock, country, folk, jazz, classical—all use diatonic harmony. Diatonic provides structure; adding non-diatonic chords creates color and surprise.

Question 7

How do I transpose a progression to a different key?

Accepted Answer

Roman numerals stay the same. Select a new root key—all diatonic chords shift proportionally while keeping the same harmonic function.

Question 8

What is functional harmony?

Accepted Answer

The idea that chords have roles: Tonic (home, stable), Subdominant (preparation), Dominant (tension, forward motion). Understanding function helps you write progressions that feel resolved.

Chord Progression Analyzer

Chord Progression Analyzer

Chord Progression Analyzer

Chord Progression Analyzer

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